<!DOCTYPE html>
<html lang="en">

<head>
    <meta charset="UTF-8">
    <meta http-equiv="X-UA-Compatible" content="IE=edge">
    <meta name="viewport" content="width=device-width, initial-scale=1.0">
    <title>设置右边框的颜色</title>
</head>

<body>

    <head>
        <style>
            p.one {
                border-style: dotted;
                border-color: lightblue;
            }
        </style>
    </head>
    <p>这是段落中的一些文本。</p>
</body>

</html>